Accrued Expenses and Other Current Liabilities (Severance and Restructuring Accruals) (Narrative) (Details) $ in Thousands	1 Months Ended	12 Months Ended
Aug. 30, 2019 employee	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Payables and Accruals [Abstract]
Number of positions eliminated (employee) \| employee	40
Restructuring Charges \| $		$ 626	$ 500

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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